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৽OSͷػೳΛݹ͍OSʹ
όοΫϙʔτ͢ΔͨΊͷΈ
Mike Apurin / @auramagi
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Apple͕ఏڙ͍ͯ͠ΔόοΫϙʔτ
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Ͳ͏ͯ͠ݹ͍OSͰ৽ػೳ͕͑ͳ͍ͷ͔ʁ
• ຖɺ৽͍͠OS͕ϦϦʔε͞Εɺ৽ػೳ͕࣍ʑͱՃ͞ΕΔ
• ΄ͱΜͲͷ߹͜ΕΒͷ৽ػೳɺͦͷͷOSόʔδϣϯʹͷΈؚ·Ε͍ͯΔ
• ৽͍͠ػೳɺ৽͍͠OSͷϑϨʔϜϫʔΫόΠφϦʹؚ·Ε͓ͯΓɺݹ͍OSͰ
ө͞Εͳ͍
• ݹ͍OSΛαϙʔτͨ͠··Ͱɺ৽ػೳΛ͏ʹόοΫϙʔτ͕ඞཁͱͳΔ
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ΞϓϦͷϏϧυ
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ΞϓϦͷϏϧυ / Static Linking
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ΞϓϦͷϏϧυ / Dynamic Linking
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ΞϓϦͷϏϧυ / γεςϜϑϨʔϜϫʔΫ
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ϥΠϒϥϦͷϏϧυ
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γεςϜϑϨʔϜϫʔΫͷ
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γεςϜϑϨʔϜϫʔΫͷswiftinterfaceϑΝΠϧ
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७ਖ਼όοΫϙʔτ / privateͩͬͨγϯϘϧΛpublicʹมΘΔ
• ϑϨʔϜϫʔΫͷϔομʔɾΠϯλϑΣʔεʹ͋Δͷެ։γϯϘϧ͚ͩ
• ݹ͍OSͰඇެ։ͷΫϥε͕ؔଘࡏ͍ͯͨ͠Βɺ৽͍͠ϦϦʔεʹ߹Θͤͯ
ެ։ʹ͢Δ͜ͱͰόοΫϙʔτ͕Մೳ
class MyViewController: UIViewController {
override func viewIsAppearing(_ animated: Bool) {
super.viewIsAppearing(animated)
// ...
}
}
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७ਖ਼όοΫϙʔτ / σϑΥϧτҾ͕มΘΔ
• SwiftͰɺσϑΥϧτҾ͕ϑϨʔϜϫʔΫͷόΠφϦʹΈࠐ·Εͣ
swiftinterfaceʹଘࡏ͍ͯ͠Δ
@frozen public struct RoundedRectangle : SwiftUI.Shape {
@inlinable public init(
cornerRadius: CoreFoundation.CGFloat,
style: SwiftUI.RoundedCornerStyle = .circular
) {
// ...
}
}
@frozen public struct RoundedRectangle : SwiftUICore.Shape {
@inlinable nonisolated public init(
cornerSize: CoreFoundation.CGSize,
style: SwiftUICore.RoundedCornerStyle = .continuous
) {
// ...
}
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७ਖ਼όοΫϙʔτ / ࣮͕·Δ͝ͱswiftinterfaceʹల։͞ΕΔ
• ؔΛ @inlinable @_alwaysEmitIntoClient Ͱम০͢Δͱɺ࣮͕ϑϨʔϜϫʔ
ΫͷόΠφϦʹΈࠐ·Εͣ swiftinterface ʹιʔείʔυͷ··Ͱίϐʔ͞ΕΔ
• όοΫϙʔτʹݶΒͣ SwiftUI Ͱͦͷύλʔϯ͕ଟ͘ΘΕ͍ͯΔ
extension SwiftUICore.Shape where Self == SwiftUICore.RoundedRectangle {
@_alwaysEmitIntoClient public static func rect(
cornerSize: CoreFoundation.CGSize,
style: SwiftUICore.RoundedCornerStyle = .continuous
) -> Self {
.init(
cornerSize: cornerSize,
style: style
)
}
}
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७ਖ਼όοΫϙʔτ / ࣮͕·Δ͝ͱswiftinterfaceʹల։͞ΕΔ
.cornerRadius(16) // deprecated
.clipShape(RoundedRectangle(cornerRadius: 16))
.clipShape(.rect(cornerRadius: 16))
.clipShape(.rect)
.clipShape(.circle)
.clipShape(.capsule)
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७ਖ਼όοΫϙʔτ / iOS 18
nonisolated public func onGeometryChange(
for type: T.Type,
of transform: @escaping (GeometryProxy) -> T,
action: @escaping (_ newValue: T) -> Void
) -> some View where T : Equatable
nonisolated public func gesture(
_ gesture: T,
isEnabled: Bool
) -> some View where T : Gesture
nonisolated public func tag(
_ tag: V,
includeOptional: Bool = true
) -> some View where V : Hashable
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७ਖ਼όοΫϙʔτ / ݹ͍OS͚ͩswiftinterfaceʹ࣮͕ల։͞ΕΔ
• ݹ͍OSͰγϯϘϧ͕ଘࡏ͍ͯ͜͠ͱʹ͢ΔͨΊͷम০: @backDeployed
• ৽OSϥΠϒϥϦͷόΠφϦΛ͍ͭͭɺݹ͍OSswiftinterfaceͷ࣮Λ͏͜ͱͱ͔
• SwiftUIʹ΄ͱΜͲݟͳ͍͕ɺStoreKitͰಛʹΑ͘ΘΕ͍ͯΔ
struct Transaction {
@backDeployed(before: iOS 17.2, macOS 14.2, tvOS 17.2, watchOS 10.2, visionOS 1.1)
public var currency: Foundation.Locale.Currency? {
get {
if #available(iOS 17.2, macOS 14.2, tvOS 17.2, watchOS 10.2, visionOS 1.1, *) {
return currencyStorage
}
else {
return backing.value(
atKeyPath: "currency",
sentinel: nil,
transform: { String($0).map({ Locale.Currency($0) }) }
)
}
}
}
}
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ϚΫϩ
• ϚΫϩࣗମOSͷϦϦʔεʹؚ·ͣXcodeʹଘࡏ͍ͯ͠ΔͷͰɺXcodeͷϦ
Ϧʔεʹ߹Θͤͯݹ͍OSͰ͑ΔϚΫϩͷՃ͕Մೳ
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ϚΫϩ / Xcode 16
struct MyCustomValueKey: EnvironmentKey {
static var defaultValue: String { "Default value" }
}
extension EnvironmentValues {
var myCustomValue: String {
get { self[MyCustomValueKey.self] }
set { self[MyCustomValueKey.self] = newValue}
}
}
extension EnvironmentValues {
@Entry var myCustomValue: String = "Default value"
}
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ϚΫϩ / Xcode 16
private struct PreviewContent: View {
@State var toggled = true
var body: some View {
Toggle("Loud Noises", isOn: $toggled)
}
}
#Preview("toggle") {
PreviewContent()
}
#Preview("toggle") {
@Previewable @State var toggled = true
return Toggle("Loud Noises", isOn: $toggled)
}
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OSSͷόοΫϙʔτ
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OSSͷόοΫϙʔτ
• ৽ػೳΛ͍ͨͯ͘όοΫϙʔτॻ͍ͯ͘ΕΔਓ͕ଟ͍͘Δ
• GitHubͱ͔Ͱݕࡧ͢Δͱཉ͍͠ͷ͕طʹ͋Δ͔͠Εͳ͍
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OSSͷόοΫϙʔτ / SwiftUI৭ʑ
• ͋Ε͜Εͷ SwiftUI ػೳͷόοΫϙʔτ
• StateObject
• AppStorage
• AsyncImage
• .task
• ͳͲͳͲ
shaps80/SwiftUIBackports
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OSSͷόοΫϙʔτ / Observation
• iOS 17Ͱग़ͨObservationϑϨʔϜϫʔΫΛ
·Δ͝ͱόοΫϙʔτ
• ຐ๏ 🪄✨
pointfreeco/swift-perception
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OSSͷόοΫϙʔτ / Group(subviews:transform:)
• iOS 18Ͱ৽͘͠Ճ͞Εͨ Group ͷػೳ
• GroupͷதͷࢠϏϡʔͰԿΒ͔ͷॲཧΛ͢Δ
• iOS 17ҎԼͰඇެ։ͷVariadicViewΛ͏ඞ
ཁ͕͋ͬͨ
Lumisilk/SwiftUI-AnySubviews
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ࣗલ࣮ͷόοΫϙʔτ
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ͦͦόοΫϙʔτͰ͖Δ͔ʁ
• όοΫϙʔτͰ͖ͳ͍ͷ͕͋Δ
• OSͱີʹؔΘΔػೳ
• WidgetsɺApp IntentsɺAppϥΠϑαΠΫϧ
• ݴޠ༻
• RegexɺConcurrency
• είʔϓ͕σΧ͗ͯ͢ݱ࣮తʹࣗલ࣮Ͱ͖ͳ͍
• SwiftUIશମ
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όοΫϙʔτʹ͍͍ͯΔػೳ
• ࠓ·ͰՄೳͩͬͨͷ͕ΑΓॻ͖͘͢ͳͬͨ
• είʔϓ͕ݶΒΕ͍ͯΔͷ
• ࣮ͷΠϝʔδ͕͖͍ͭ͢ͷ
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ʮόοΫϙʔτʯ͔ʮϑΥʔϧόοΫʯ͔
• όοΫϙʔτ
• ৽ػೳͱಉ͡ΈΛ࣮ͯ͠ಉ͡Α͏ʹ͏
• ϑΥʔϧόοΫ
• ৽ػೳͷΈͱؔͳ͘ɺͦΕʹҧ͍ޮՌΛ࣮͢Δ
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ʮόοΫϙʔτʯ͔ʮϑΥʔϧόοΫʯ͔
• ྫ͑ɺiOS 17 Ͱొͨ͠ ContentUnavailableView
Λ͍͍ͨ߹
ContentUnavailableView {
Label("ݕࡧ݁Ռ͕͋Γ·ͤΜ", systemImage: "magnifyingglass")
} description: {
Text("ผͷΩʔϫʔυΛ͓ࢼ͍ͩ͘͠͞")
}
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ʮόοΫϙʔτʯ͔ʮϑΥʔϧόοΫʯ͔
@ViewBuilder var unavailableView: some View {
if #available(iOS 17, *) {
// ...
} else {
VStack(spacing: 16) {
Image(systemName: "magnifyingglass")
.font(.system(.largeTitle).weight(.medium))
.imageScale(.large)
.foregroundColor(.secondary)
VStack {
Text("ݕࡧ݁Ռ͕͋Γ·ͤΜ")
.font(.title2.bold())
Text("ผͷΩʔϫʔυΛ͓ࢼ͍ͩ͘͠͞")
.font(.callout)
.foregroundColor(.secondary)
}
}
}
}
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όοΫϙʔτΛ࣮ / దͳωʔϛϯά
• ޙ΄Ͳআ͞ΕΔલఏͷίʔυ
• Ͳ͜ͰΘΕ͍ͯΔ͔ɺͲ͏ͬͯണ͕͢ͷ͔Λ࣮͔࣌ΒܾΊΔ
• enum Backport ͰωʔϜεϖʔεΛ࡞͓ͬͯ͘ͱศར
• ݩωλ Dave DeLong ࢯͷهࣄ
• https://davedelong.com/blog/2021/10/09/simplifying-backwards-compatibility-
in-swift/
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όοΫϙʔτΛ࣮ / దͳωʔϛϯά
public struct Backport {
public let content: Content
public init(_ content: Content) {
self.content = content
}
}
extension View {
var backport: Backport { Backport(self) }
}
extension Backport where Content: View {
func myNewFunction() -> some View {
// ...
}
}
// ...
Text("iOSDC 2024")
.backport.myNewFunction()
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όοΫϙʔτΛ࣮ / OSͷόʔδϣϯͰ͍͚Δ
• ৽OSͰ৽ػೳΛ७ਖ਼ͷ··ɺݹ͍OSͰόοΫϙʔτͱ͍͏͍͚
extension Backport where Content: View {
func myNewFunction() -> some View {
if #available(iOS 18, *) {
// ...
} else {
...
}
}
}
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όοΫϙʔτΛ࣮ / geometryGroup
struct ContentView: View {
@State var flag = false
@State var flag2 = false
var body: some View {
Color.cyan
.frame(width: 128, height: 128)
.overlay {
Group {
if flag2 {
Text("iOSDC")
} else {
Text("લࡇ")
}
}
.task(id: flag2) {
try? await Task.sleep(for: .seconds(1.5))
flag2.toggle()
}
}
.offset(y: flag ? 100 : -100)
.animation(.linear(duration: 1).repeatForever(), value: flag)
.onAppear() {
flag.toggle()
}
}
}
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όοΫϙʔτΛ࣮ / geometryGroup
struct ContentView: View {
@State var flag = false
@State var flag2 = false
var body: some View {
Color.cyan
.frame(width: 128, height: 128)
.overlay {
Group {
if flag2 {
Text("iOSDC")
} else {
Text("લࡇ")
}
}
.task(id: flag2) {
try? await Task.sleep(for: .seconds(1.5))
flag2.toggle()
}
}
.geometryGroup()
.offset(y: flag ? 100 : -100)
.animation(.linear(duration: 1).repeatForever(), value: flag)
.onAppear() {
flag.toggle()
}
}
}
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όοΫϙʔτΛ࣮ / geometryGroup
• geometryGroupiOS 17Ҏ߱ 😇
• ͨͩ͠ɺ࣮ผͷॻ͖ํͰಉ༷ͳޮՌ͕ಘΒΕΔ
extension Backport where Content: View {
@ViewBuilder func geometryGroup() -> some View {
if #available(iOS 17, *) {
content.geometryGroup()
} else {
content.transformEffect(.identity)
}
}
}
// ...
}
.backport.geometryGroup()
.offset(y: flag ? 100 : -100)
// ...
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·ͱΊ
• Apple७ਖ਼ͷόοΫϙʔτ͕ҙ֎ͱ͋Δ
• OSSͷόοΫϙʔτ๛
• ࣗલͰ࣮Ͱ͖ͦ͏ͳػೳͳΒɺόοΫϙʔτʹઓ͢Δͱ͍͍Α
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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠